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can i say thanks for any help

i have found the engine number g100-1000591

as much details of the mower that i know its a Honda i do have a manual that i downloaded that looks the same as the one in the pic but with a lever on the handle (this i think they added at a later model) there was details of the motor being a g100 but it does not look the same if i search online but perhaps its a version of it for a mower?

please see pic the mower pic is off the internet but mine is the same

the mower will not start it came to me from a friend that said he could not get it going

i have done cleaned the fuel lines and put in new fuel and the spark plug is getting wet with fuel so i think this is not the problem

there is no spark i have taken out the spark plug and rested it on the mower body and can not see any spark

i tried another spark plug from my mower the same way on the mower body still no spark

i have checked the switch near the top of the handle and it is working it turns on and off and creates a short to earth that will stop the mower this is normal i think

the only leads i cant cheak is the spark plug lead to under the mower body and from the switch to the mower body and i dont know what is under there or what i should be looking for

someone has said condenser and points as its old poss 1980s-85

thanks for any help in advance sorry i cant give any more details on the mower or engine its old and i cant see any stamps on the engine or mower body apart from a serial number stamped on the far back of the mower deck

Try removing the kill wire off of the coil. You "might" have an undetected short.

chance123 said:

Try removing the kill wire off of the coil. You "might" have an undetected short.

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sorry you are going to have to explain this in stupid terms i have got to my point where i am lost i dont know that much about engines im afraid

i assume you mean the black bit my last photo ?

how would i get to it

thanks angel

sorry by the kill switch you mean the thin wire that comes down to the mower engine

i will try this later


any more hints please i think this is more than just an easy fix i think i poss need to remove the pullstart and have a look under there but have taken off the nut but the large wheel will not come off so i can cheak the wires to the plug and the thin wire to the switch

any help on this will i need a bearing puller ? to remove this and is it just a case of taking it off and refiting is easy or is there bits in there that will fly every where ?

thanks for the help

*Make sure you test the spark plug on BARE metal without any paint on it. Testing it against part of the engine works the best.

i have found the engine number hope this helps a bit with any help

g100-1000591

does this have coil or is it condenser and points ?

thanks again for anyhelp angel

ps i have bought a new spark plug as it was cheap anyway just to make sure its not that

but from the looks as i try a spark plug from my other mower on the engine body there is no spark

If I remember right, those little mowers had points and condenser.

How do I cheak if there working do I need to get down to them and take the top off ?

I was going to offer to take that little mower off your hands, but shipping from the UK would be a bit prohibitive.:biggrin:

Besides a spark plug, have you tried a spark tester to check for spark? It can be tricky to try to pull a rope and hold a spark plug to a good ground if you're doing it yourself. It can be hard to see spark sometime in bright light. Move indoors or to shade and check, if you haven't already. Might try those first before pulling more off to check the points.

The shop manual I have shows the points and condenser under the flywheel. To pull it off, you'd be best to get a harmonic puller as there are three threaded holes in the flywheel to use for that purpose. Torque when putting it back on is 500 kg-cm (36 ft-lb) The points are under a cover, and you could check them for corrosion. the manual says to use a point file or fine emery cloth to polish the faces.

Hope that helps a bit.

How do I test the condencer

i have done more work and put the new spark plug in still no change

i have removed the top part and have got to the points and coil and condenser and now i need some help if any one is able to help me

on how to test and how it works and will the cracks in the black unit be the problem (i assume this is a coil)

You can clean those points with a fingernail emery board, but make sure afterwards, you run some thin cardboard through them to clean any abraisive out of them.

angellonewolf said:

How do I test the condencer

i have done more work and put the new spark plug in still no change

i have removed the top part and have got to the points and coil and condenser and now i need some help if any one is able to help me

on how to test and how it works and will the cracks in the black unit be the problem (i assume this is a coil)

View attachment 13680

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You'll be able to test the coil also with the information I passed along to you. You should have that little G100V singing like a bird in no time.:thumbsup:

bwdbrn1 said:

You'll be able to test the coil also with the information I passed along to you. You should have that little G100V singing like a bird in no time.:thumbsup:

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thanks to every one that has helped and special thanks to bwdbrn1 for providing me with a shop manual i had a look yesterday but think it down to the condencer or coil will have a look in the next few days as got as bit on at the moment

thanks again angel

Be sure to let us know how it goes for you.:thumbsup:

bwdbrn1 said:

Be sure to let us know how it goes for you.:thumbsup:

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again thanks to everyone it has risen from the dead and runs very well i checked the coil and condenser with the shop manual cleaned the points (with an nail file) and adjusted the points

i put it back together findind the woodruff key to be replaced with a made up piece of metal this gave problems in get it it together again but did it in the end

and went to pull it a few time just to prime it as i thought i had the switch in the off position but i did not on the first pull that was not hard the motor spin over and ran no problem i cut the next doors grass with it

i will be going to take it apart again just to replace the wood ruff key but apart from that change the oil and sharpen the blades

and if you are intrested i will post hope later today my next project i think you will be amazed at what i have found back later you will have to wait untill i get a pic so i can post it

again thanks for all your help if you are still able i might need it on the next one oh what is it i hear you cry lol

BIGxMONEY said:

*Make sure you test the spark plug on BARE metal without any paint on it. Testing it against part of the engine works the best.

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Here is an article our technician wrote about testing spark plugs. Maybe you will find it helpful.

How to Test a Small Engine for Spark : eReplacementParts.com